19916776331 has 8 divisors (see below), whose sum is σ = 20920360704. Its totient is φ = 18924661800.

The previous prime is 19916776307. The next prime is 19916776333. The reversal of 19916776331 is 13367761991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19916776331 is a prime.

It is a super-2 number, since 2×19916776331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19916776333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2863901 + ... + 2870846.

It is an arithmetic number, because the mean of its divisors is an integer number (2615045088).

Almost surely, 2^19916776331 is an apocalyptic number.

19916776331 is a deficient number, since it is larger than the sum of its proper divisors (1003584373).

19916776331 is a wasteful number, since it uses less digits than its factorization.

19916776331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5734921.

The product of its digits is 1285956, while the sum is 53.

The spelling of 19916776331 in words is "nineteen billion, nine hundred sixteen million, seven hundred seventy-six thousand, three hundred thirty-one".